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The American Academy of Pediatrics recommends renal ultrasound (RUS) and voiding cystourethrography (VCUG) for all infants after a first urinary tract infection (UTI). However, many congenital renal anomalies are identified by a prenatal US. At the present time, there are no data regarding the yield of post-UTI imaging among infants who have a documented normal prenatal US. We retrospectively reviewed the charts of all patients <1 year of age with a first UTI who had normal kidneys noted on prenatal US to determine the frequency of abnormal findings. Abnormal RUS and VCUG results were noted in 5.1% (24 of 471) and 20.4% (75 of 368) of infants, respectively. While the abnormal US rate is significantly less than what has been previously reported, the frequency of abnormal VCUGs is similar. These results suggest that a post-UTI RUS may not be needed if the prenatal US was normal. However, a VCUG continues to be indicated.

Objectives. This study clarified ultrasonography (US) changes after splint therapy and investigated the use of this modality for evaluating treatment of the masseter muscle in temporomandibular disorder (TMD) patients with myofascial pain. Methods. Twenty-five female TMD patients with myofascial pain were examined with US before and after splint therapy. The thickness and internal appearance of the masseter muscle were evaluated. Results. No differences in thickness were found before and after treatment in either "Improved" or "Not improved" patients. Twelve patients showed changes in the internal appearance. A significant difference was observed in the distributions of types of internal appearance before and after treatment. Three representative cases are presented. Conclusions. US has potential for evaluating the masseter muscle in TMD patients with myofascial pain, especially muscles that appear edematous before treatment.

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